diff options
| author | Botahamec <botahamec@outlook.com> | 2024-05-22 17:27:35 -0400 |
|---|---|---|
| committer | Botahamec <botahamec@outlook.com> | 2024-05-22 17:27:35 -0400 |
| commit | ef191a3e8ecf4093fcd08036e35012c1af173a08 (patch) | |
| tree | 9a6986986ad8392ae147c64c436214fa290773d7 /src | |
| parent | ebbe3cfce28914d776f3e5f89894fab50911c57e (diff) | |
Documentation for types
Diffstat (limited to 'src')
| -rw-r--r-- | src/collection.rs | 78 | ||||
| -rw-r--r-- | src/collection/boxed.rs | 8 | ||||
| -rw-r--r-- | src/collection/owned.rs | 7 | ||||
| -rw-r--r-- | src/collection/ref.rs | 9 | ||||
| -rw-r--r-- | src/collection/retry.rs | 8 | ||||
| -rw-r--r-- | src/lib.rs | 11 | ||||
| -rw-r--r-- | src/lockable.rs | 123 |
7 files changed, 201 insertions, 43 deletions
diff --git a/src/collection.rs b/src/collection.rs index a84c1ce..c51e3cf 100644 --- a/src/collection.rs +++ b/src/collection.rs @@ -1,6 +1,6 @@ use std::marker::PhantomData; -use crate::{key::Keyable, lockable::Lock}; +use crate::{key::Keyable, lockable::RawLock}; mod boxed; mod guard; @@ -8,25 +8,95 @@ mod owned; mod r#ref; mod retry; +/// Locks a collection of locks, which cannot be shared immutably. +/// +/// This could be a tuple of [`Lockable`] types, an array, or a `Vec`. But it +/// can be safely locked without causing a deadlock. +/// +/// The data in this collection is guaranteed to not contain duplicates because +/// `L` must always implement [`OwnedLockable`]. The underlying data may not be +/// immutably referenced and locked. Because of this, there is no need for +/// sorting the locks in the collection, or checking for duplicates, because it +/// can be guaranteed that until the underlying collection is mutated (which +/// requires releasing all acquired locks in the collection to do), then the +/// locks will stay in the same order and be locked in that order, preventing +/// cyclic wait. +/// +/// [`Lockable`]: `crate::lockable::Lockable` +/// [`OwnedLockable`]: `crate::lockable::OwnedLockable` #[derive(Debug)] pub struct OwnedLockCollection<L> { data: L, } -/// A type which can be locked. +/// Locks a reference to a collection of locks, by sorting them by memory +/// address. /// /// This could be a tuple of [`Lockable`] types, an array, or a `Vec`. But it /// can be safely locked without causing a deadlock. +/// +/// Upon construction, it must be confirmed that the collection contains no +/// duplicate locks. This can be done by either using [`OwnedLockable`] or by +/// checking. Regardless of how this is done, the locks will be sorted by their +/// memory address before locking them. The sorted order of the locks is stored +/// within this collection. +/// +/// Unlike [`BoxedLockCollection`], this type does not allocate memory for the +/// data, although it does allocate memory for the sorted list of lock +/// references. This makes it slightly faster, but lifetimes must be handled. +/// +/// [`Lockable`]: `crate::lockable::Lockable` +/// [`OwnedLockable`]: `crate::lockable::OwnedLockable` pub struct RefLockCollection<'a, L> { data: &'a L, - locks: Vec<&'a dyn Lock>, + locks: Vec<&'a dyn RawLock>, } +/// Locks a collection of locks, stored in the heap, by sorting them by memory +/// address. +/// +/// This could be a tuple of [`Lockable`] types, an array, or a `Vec`. But it +/// can be safely locked without causing a deadlock. +/// +/// Upon construction, it must be confirmed that the collection contains no +/// duplicate locks. This can be done by either using [`OwnedLockable`] or by +/// checking. Regardless of how this is done, the locks will be sorted by their +/// memory address before locking them. The sorted order of the locks is stored +/// within this collection. +/// +/// Unlike [`RefLockCollection`], this is a self-referential type which boxes +/// the data that is given to it. This means no lifetimes are necessary on the +/// type itself, but it is slightly slower because of the memory allocation. +/// +/// [`Lockable`]: `crate::lockable::Lockable` +/// [`OwnedLockable`]: `crate::lockable::OwnedLockable` pub struct BoxedLockCollection<L> { data: Box<L>, - locks: Vec<&'static dyn Lock>, + locks: Vec<&'static dyn RawLock>, } +/// Locks a collection of locks using a retrying algorithm. +/// +/// This could be a tuple of [`Lockable`] types, an array, or a `Vec`. But it +/// can be safely locked without causing a deadlock. +/// +/// The data in this collection is guaranteed to not contain duplicates, but it +/// also not be sorted. In some cases the lack of sorting can increase +/// performance. However, in most cases, this collection will be slower. Cyclic +/// wait is not guaranteed here, so the locking algorithm must release all its +/// locks if one of the lock attempts blocks. This results in wasted time and +/// potential [livelocking]. +/// +/// However, one case where this might be faster than [`RefLockCollection`] is +/// when the first lock in the collection is always the first in any +/// collection, and the other locks in the collection are always locked after +/// that first lock is acquired. This means that as soon as it is locked, there +/// will be no need to unlock it later on subsequent lock attempts, because +/// they will always succeed. +/// +/// [`Lockable`]: `crate::lockable::Lockable` +/// [`OwnedLockable`]: `crate::lockable::OwnedLockable` +/// [livelocking]: https://en.wikipedia.org/wiki/Deadlock#Livelock #[derive(Debug)] pub struct RetryingLockCollection<L> { data: L, diff --git a/src/collection/boxed.rs b/src/collection/boxed.rs index a62a33d..ea840ab 100644 --- a/src/collection/boxed.rs +++ b/src/collection/boxed.rs @@ -1,14 +1,14 @@ use std::fmt::Debug; use std::marker::PhantomData; -use crate::lockable::Lock; -use crate::{Keyable, Lockable, OwnedLockable, Sharable}; +use crate::lockable::{Lockable, OwnedLockable, RawLock, Sharable}; +use crate::Keyable; use super::{BoxedLockCollection, LockGuard}; /// returns `true` if the sorted list contains a duplicate #[must_use] -fn contains_duplicates(l: &[&dyn Lock]) -> bool { +fn contains_duplicates(l: &[&dyn RawLock]) -> bool { l.windows(2) .any(|window| std::ptr::eq(window[0], window[1])) } @@ -18,7 +18,7 @@ unsafe impl<L: Lockable> Lockable for BoxedLockCollection<L> { type ReadGuard<'g> = L::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.data.get_ptrs(ptrs) } diff --git a/src/collection/owned.rs b/src/collection/owned.rs index eb5e03a..d77d568 100644 --- a/src/collection/owned.rs +++ b/src/collection/owned.rs @@ -1,10 +1,11 @@ use std::marker::PhantomData; -use crate::{lockable::Lock, Keyable, Lockable, OwnedLockable, Sharable}; +use crate::lockable::{Lockable, OwnedLockable, RawLock, Sharable}; +use crate::Keyable; use super::{LockGuard, OwnedLockCollection}; -fn get_locks<L: Lockable>(data: &L) -> Vec<&dyn Lock> { +fn get_locks<L: Lockable>(data: &L) -> Vec<&dyn RawLock> { let mut locks = Vec::new(); data.get_ptrs(&mut locks); locks @@ -15,7 +16,7 @@ unsafe impl<L: Lockable> Lockable for OwnedLockCollection<L> { type ReadGuard<'g> = L::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.data.get_ptrs(ptrs) } diff --git a/src/collection/ref.rs b/src/collection/ref.rs index 329f0ae..2e2883a 100644 --- a/src/collection/ref.rs +++ b/src/collection/ref.rs @@ -1,12 +1,13 @@ use std::fmt::Debug; use std::marker::PhantomData; -use crate::{key::Keyable, lockable::Lock, Lockable, OwnedLockable, Sharable}; +use crate::lockable::{Lockable, OwnedLockable, RawLock, Sharable}; +use crate::Keyable; use super::{LockGuard, RefLockCollection}; #[must_use] -pub fn get_locks<L: Lockable>(data: &L) -> Vec<&dyn Lock> { +pub fn get_locks<L: Lockable>(data: &L) -> Vec<&dyn RawLock> { let mut locks = Vec::new(); data.get_ptrs(&mut locks); locks.sort_by_key(|lock| std::ptr::from_ref(*lock)); @@ -15,7 +16,7 @@ pub fn get_locks<L: Lockable>(data: &L) -> Vec<&dyn Lock> { /// returns `true` if the sorted list contains a duplicate #[must_use] -fn contains_duplicates(l: &[&dyn Lock]) -> bool { +fn contains_duplicates(l: &[&dyn RawLock]) -> bool { l.windows(2) .any(|window| std::ptr::eq(window[0], window[1])) } @@ -43,7 +44,7 @@ unsafe impl<'c, L: Lockable> Lockable for RefLockCollection<'c, L> { type ReadGuard<'g> = L::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { ptrs.extend_from_slice(&self.locks); } diff --git a/src/collection/retry.rs b/src/collection/retry.rs index 58a0642..d15d7d6 100644 --- a/src/collection/retry.rs +++ b/src/collection/retry.rs @@ -1,4 +1,6 @@ -use crate::{lockable::Lock, Keyable, Lockable, OwnedLockable, Sharable}; +use crate::lockable::{Lockable, OwnedLockable, RawLock, Sharable}; +use crate::Keyable; + use std::collections::HashSet; use std::marker::PhantomData; @@ -7,7 +9,7 @@ use super::{LockGuard, RetryingLockCollection}; fn contains_duplicates<L: Lockable>(data: L) -> bool { let mut locks = Vec::new(); data.get_ptrs(&mut locks); - let locks = locks.into_iter().map(|l| l as *const dyn Lock); + let locks = locks.into_iter().map(|l| l as *const dyn RawLock); let mut locks_set = HashSet::new(); for lock in locks { @@ -24,7 +26,7 @@ unsafe impl<L: Lockable> Lockable for RetryingLockCollection<L> { type ReadGuard<'g> = L::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.data.get_ptrs(ptrs) } @@ -107,19 +107,24 @@ //! ``` mod key; -mod lockable; pub mod collection; +pub mod lockable; pub mod mutex; pub mod rwlock; -pub use collection::BoxedLockCollection as LockCollection; pub use key::{Keyable, ThreadKey}; -pub use lockable::{Lockable, OwnedLockable, Sharable}; #[cfg(feature = "spin")] pub use mutex::SpinLock; +/// A collection of locks that can be acquired simultaneously. +/// +/// This re-exports [`BoxedLockCollection`] as a sensible default. +/// +/// [`BoxedLockCollection`]: collection::BoxedLockCollection +pub type LockCollection<L> = collection::BoxedLockCollection<L>; + /// A mutual exclusion primitive useful for protecting shared data, which cannot deadlock. /// /// By default, this uses `parking_lot` as a backend. diff --git a/src/lockable.rs b/src/lockable.rs index 23aeb4c..2f98d3a 100644 --- a/src/lockable.rs +++ b/src/lockable.rs @@ -7,14 +7,14 @@ use crate::{ use lock_api::{RawMutex, RawRwLock}; -/// A type that may be locked and unlocked +/// A raw lock type that may be locked and unlocked /// /// # Safety /// /// A deadlock must never occur. The `unlock` method must correctly unlock the /// data. The `get_ptrs` method must be implemented correctly. The `Output` /// must be unlocked when it is dropped. -pub unsafe trait Lock: Send + Sync { +pub unsafe trait RawLock: Send + Sync { /// Blocks until the lock is acquired /// /// # Safety @@ -46,32 +46,111 @@ pub unsafe trait Lock: Send + Sync { /// It is undefined behavior to use this if the lock is not acquired unsafe fn unlock(&self); + /// Blocks until the data the lock protects can be safely read. + /// + /// Some locks, but not all, will allow multiple readers at once. If + /// multiple readers are allowed for a [`Lockable`] type, then the + /// [`Sharable`] marker trait should be implemented. + /// + /// # Safety + /// + /// It is undefined behavior to use this without ownership or mutable + /// access to the [`ThreadKey`], which should last as long as the return + /// value is alive. + /// + /// [`ThreadKey`]: `crate::ThreadKey` unsafe fn read(&self); + // Attempt to read without blocking. + /// + /// Returns `true` if successful, `false` otherwise. + /// + /// Some locks, but not all, will allow multiple readers at once. If + /// multiple readers are allowed for a [`Lockable`] type, then the + /// [`Sharable`] marker trait should be implemented. + /// + /// # Safety + /// + /// It is undefined behavior to use this without ownership or mutable + /// access to the [`ThreadKey`], which should last as long as the return + /// value is alive. + /// + /// [`ThreadKey`]: `crate::ThreadKey` unsafe fn try_read(&self) -> bool; + /// Releases the lock after calling `read`. + /// + /// # Safety + /// + /// It is undefined behavior to use this if the read lock is not acquired unsafe fn unlock_read(&self); } +/// A type that may be locked and unlocked. +/// +/// This trait is usually implemented on collections of [`RawLock`]s. For +/// example, a `Vec<Mutex<i32>>`. +/// +/// # Safety +/// +/// Acquiring the locks returned by `get_ptrs` must allow for the values +/// returned by `guard` or `read_guard` to be safely used for exclusive or +/// shared access, respectively. +/// +/// Dropping the `Guard` and `ReadGuard` types must unlock those same locks. +/// +/// The order of the resulting list from `get_ptrs` must be deterministic. As +/// long as the value is not mutated, the references must always be in the same +/// order. pub unsafe trait Lockable { - /// The guard returned that does not hold a key + /// The exclusive guard that does not hold a key type Guard<'g> where Self: 'g; + /// The shared guard type that does not hold a key type ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>); + /// Yields a list of references to the [`RawLock`]s contained within this + /// value. + /// + /// These reference locks which must be locked before acquiring a guard, + /// and unlocked when the guard is dropped. The order of the resulting list + /// is deterministic. As long as the value is not mutated, the references + /// will always be in the same order. + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>); + /// Returns a guard that can be used to access the underlying data mutably. + /// + /// # Safety + /// + /// All locks given by calling [`Lockable::get_ptrs`] must be locked + /// exclusively before calling this function. The locks must not be + /// unlocked until this guard is dropped. #[must_use] unsafe fn guard(&self) -> Self::Guard<'_>; + /// Returns a guard that can be used to immutably access the underlying + /// data. + /// + /// # Safety + /// + /// All locks given by calling [`Lockable::get_ptrs`] must be locked using + /// [`RawLock::read`] before calling this function. The locks must not be + /// unlocked until this guard is dropped. #[must_use] unsafe fn read_guard(&self) -> Self::ReadGuard<'_>; } +/// A marker trait to indicate that multiple readers can access the lock at a +/// time. +/// +/// # Safety +/// +/// This type must only be implemented if the lock can be safely shared between +/// multiple readers. pub unsafe trait Sharable: Lockable {} /// A type that may be locked and unlocked, and is known to be the only valid @@ -83,7 +162,7 @@ pub unsafe trait Sharable: Lockable {} /// time, i.e., this must either be an owned value or a mutable reference. pub unsafe trait OwnedLockable: Lockable {} -unsafe impl<T: Send, R: RawMutex + Send + Sync> Lock for Mutex<T, R> { +unsafe impl<T: Send, R: RawMutex + Send + Sync> RawLock for Mutex<T, R> { unsafe fn lock(&self) { self.raw().lock() } @@ -109,7 +188,7 @@ unsafe impl<T: Send, R: RawMutex + Send + Sync> Lock for Mutex<T, R> { } } -unsafe impl<T: Send, R: RawRwLock + Send + Sync> Lock for RwLock<T, R> { +unsafe impl<T: Send, R: RawRwLock + Send + Sync> RawLock for RwLock<T, R> { unsafe fn lock(&self) { self.raw().lock_exclusive() } @@ -139,7 +218,7 @@ unsafe impl<T: Send, R: RawMutex + Send + Sync> Lockable for Mutex<T, R> { type Guard<'g> = MutexRef<'g, T, R> where Self: 'g; type ReadGuard<'g> = MutexRef<'g, T, R> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { ptrs.push(self); } @@ -157,7 +236,7 @@ unsafe impl<T: Send, R: RawRwLock + Send + Sync> Lockable for RwLock<T, R> { type ReadGuard<'g> = RwLockReadRef<'g, T, R> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { ptrs.push(self); } @@ -181,7 +260,7 @@ unsafe impl<'l, T: Send, R: RawRwLock + Send + Sync> Lockable for ReadLock<'l, T type ReadGuard<'g> = RwLockReadRef<'g, T, R> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { ptrs.push(self.as_ref()); } @@ -199,7 +278,7 @@ unsafe impl<'l, T: Send, R: RawRwLock + Send + Sync> Lockable for WriteLock<'l, type ReadGuard<'g> = RwLockWriteRef<'g, T, R> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { ptrs.push(self.as_ref()); } @@ -219,7 +298,7 @@ unsafe impl<T: Lockable> Lockable for &T { type ReadGuard<'g> = T::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { (*self).get_ptrs(ptrs); } @@ -237,7 +316,7 @@ unsafe impl<T: Lockable> Lockable for &mut T { type ReadGuard<'g> = T::ReadGuard<'g> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { (**self).get_ptrs(ptrs) } @@ -257,7 +336,7 @@ unsafe impl<A: Lockable> Lockable for (A,) { type ReadGuard<'g> = (A::ReadGuard<'g>,) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); } @@ -275,7 +354,7 @@ unsafe impl<A: Lockable, B: Lockable> Lockable for (A, B) { type ReadGuard<'g> = (A::ReadGuard<'g>, B::ReadGuard<'g>) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); } @@ -294,7 +373,7 @@ unsafe impl<A: Lockable, B: Lockable, C: Lockable> Lockable for (A, B, C) { type ReadGuard<'g> = (A::ReadGuard<'g>, B::ReadGuard<'g>, C::ReadGuard<'g>) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); self.2.get_ptrs(ptrs); @@ -323,7 +402,7 @@ unsafe impl<A: Lockable, B: Lockable, C: Lockable, D: Lockable> Lockable for (A, D::ReadGuard<'g>, ) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); self.2.get_ptrs(ptrs); @@ -368,7 +447,7 @@ unsafe impl<A: Lockable, B: Lockable, C: Lockable, D: Lockable, E: Lockable> Loc E::ReadGuard<'g>, ) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); self.2.get_ptrs(ptrs); @@ -418,7 +497,7 @@ unsafe impl<A: Lockable, B: Lockable, C: Lockable, D: Lockable, E: Lockable, F: F::ReadGuard<'g>, ) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); self.2.get_ptrs(ptrs); @@ -473,7 +552,7 @@ unsafe impl<A: Lockable, B: Lockable, C: Lockable, D: Lockable, E: Lockable, F: G::ReadGuard<'g>, ) where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { self.0.get_ptrs(ptrs); self.1.get_ptrs(ptrs); self.2.get_ptrs(ptrs); @@ -573,7 +652,7 @@ unsafe impl<T: Lockable, const N: usize> Lockable for [T; N] { type ReadGuard<'g> = [T::ReadGuard<'g>; N] where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { for lock in self { lock.get_ptrs(ptrs); } @@ -603,7 +682,7 @@ unsafe impl<T: Lockable> Lockable for Box<[T]> { type ReadGuard<'g> = Box<[T::ReadGuard<'g>]> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { for lock in self.iter() { lock.get_ptrs(ptrs); } @@ -633,7 +712,7 @@ unsafe impl<T: Lockable> Lockable for Vec<T> { type ReadGuard<'g> = Box<[T::ReadGuard<'g>]> where Self: 'g; - fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn Lock>) { + fn get_ptrs<'a>(&'a self, ptrs: &mut Vec<&'a dyn RawLock>) { for lock in self { lock.get_ptrs(ptrs); } |
